Improvement in saw-mills



UNITED STATES PATENT -IOEEICE` .A. P. CONANT, OF SMITHLAND, KENTUCKY.

.IMPROVEMENT IN SAW-MILLS.

Specification forming part of Letters Patent No. 50,223, dated October3, 1865.

To all whom t may concerm.

'Be it known that I, A. l?. CONANT, of Smithdeclare that the followingis a full, clear, andl exact description thereof, which will enableothers skilled in the art to make and use the sain e, reference beinghad to theaccompanyingV drawings, forming part of this specification, inwhich Figure l represents a side elevation of this invention, partly insection. Fig. 2 is a liorizontal section ot' the saine, the line a: Fig.1, indicating the plane of section.

Similar letters of reference parts.

This invention consists in the arrangement of two dogs,'which areadjustable according to the width or thickness ofthe log to be clampedbetween them, and which arerguided'by rods recured in the end ot'aswinging'head, which can be raised or lowered on a standard risingl'rom the head-block, and which also allows ot' being turned in ahorizontal plane in such a man ner that by raising and lowering the headthe positionnof the dogs can be r^"dily adjusted to suit the diametersof dicrent saws or the size and shape ot'diiie.' utlogs or pieces tolies-awed,V and by turning said head the dogs can be swung back outofthe wayor forward lin-their working position, andthe operationofadjusting the log in the proper positiontbr sawing isgreatlyfacilitated.

A represents the head block of a sawingmachine, which isinade'adjustable on the carriage in the usual manner, and which isprovided with'a slide, B, that movesin a suitable guideWa-y in the headblock, and to which a reciprocating motion is imparted by ascrewspindle, C, or by any other suitable means.

From the slide B rises a standard, D, which is provided on its topwitha-ange or bracket,

. o, and arod, b, is secured with its upper'end in said bracket and withits lower end Y in the slide, as shown in Fig. 1 of the drawings. Thisrod is round and of uniform thickness from top to bottom, and it formsthe guide for the head E, which is so .arranged that it can turn freelyin either direction on the rod b,

`and which is provided with a set-screw, d, and

with an adjusting screw,l e. The set screw indicate likev -rection thedogs open. dogs can be readily adjusted to suitthe log or g, incombination with passes edgewise through 'the hand and serves to securesaid head in the desired position, and the adjusting-screw extends downthrough the head in a direction parallel with the guide-rod b,

and it serves to raise or lowerthe head. The

lower end of this adjusting-screw bears on the surface of theslidewithout; however, passing into the same, so thatit does not interferewith the revolving motion of the head.

Firmly secured in the head E are two rods, f, which form thescrew-spindle, g, serves to adjust these dogs closer together or fartherapart, as maybe desirable. Said screw spindle passes freely through thehead, and two collars, h, are tast' ened together, one above and theother below the head, to prevent it from moving,r in a directionparallel with its axis. One halln ot' the screw-spindle is provided witha right-handed and the other with a left-handed screw-thread, and it istapped into the dogs F, as'indicated in Fig. l ot' the drawings. A crankor handwhecl, G, serves to turn the screw-spindle, and by turning thesame in one direction the dogs close up and .by turning it in theopposite di- By these means the piece to be sawed. Said lof:r or piececan be firmly clamped. and raised or lowered bodily while in the dogs,Zand it' the dogs are not rcquired they can be readily and convenientlyswung .out ot' the way.

p This improvement is applicable to the head- Y vblocks of saw mills-ot'any description, and

facilitates the operation of adjusting the log or other piece to besawedin relation to the saw. l

I claim as new and desire to secure by Letters Patent Thevertically-adjustable revolving head E, provided with guide-rods fandscrew-spindle dogs F and with the head-blockA of a'sawing-machine,constructed and operating substantially as and for the pun pose setforth. j\

flhe above specification of my invention signed by me this 28th dayotEJune, 18:15.

A. coNAN'r.

Witnesses:

M. M. LIVINGSTON, O. 5L. ToPLIFE.

guides for the dogs F, and a.

